The planting technique of micro-water harvesting includes two parts: water harvesting area and planting area. The water harvesting area is a ridge mulched with plastic film, even small rain can easily run down planting area, so soil moisture in planting area can be improved greatly. The technique has been developed in dryland of the south part of Ning xia province in order to improve the capability of soil water supplying in planting area, decrease the water stress and increase the WU E. The results of experiment from 1997 to 1998 show that the water consumption of millet increased by 92.2%～119.3%, the yield of millet increased by 63. 6% ～98. 1% compared with CK. And WUE reaches to 7.75～12.65 kg/(mm·hm_{2) . Effect of the ridge with 60cm width is prior to the ridge with 75cm wide on improving millet yield.}